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Energy sources

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  • What is the main renewable energy source in the world?
    hydroelectric
  • The wind always flows from _______ to _______ pressure
    high to low pressure
  • True or false: there two ways to use the sun to generate electricity.
    True: photovoltaic pannels and thermal
  • Ethanol comes from ___________.
    sugar cane.
  • True or false: tides can generate electricity
    True
  • Name two disavantages of hydro power.
    displacing animals and families, and risks of flooding
  • True or false: geothermal uses the heat from radioactive decay in inner layes of the Earth.
    True
  • what is the main energy source in the world?
    crude oil
  • True or false: oil is formed from the remains of marine dead organisms
    True
  • True or false: In Iceland 90% of homes use geothermal as a form of heating.
    True
  • True or false: biomass burns all types of crude oil to generate electricity.
    false
  • Name two disavantages of solar energy.
    high cost, low efficiency
  • What is the energy used to cook in the kitchen?
    natural gas
  • Name 4 points that make a useful energy source.
    sustainability, cost, avaiability, minimal pollution
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